509949887902 has 24 divisors (see below), whose sum is σ = 946618731216. Its totient is φ = 201738416256.

The previous prime is 509949887861. The next prime is 509949887903. The reversal of 509949887902 is 209788949905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509949887903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107763883 + ... + 107768614.

It is an arithmetic number, because the mean of its divisors is an integer number (39442447134).

Almost surely, 2^509949887902 is an apocalyptic number.

509949887902 is a deficient number, since it is larger than the sum of its proper divisors (436668843314).

509949887902 is a wasteful number, since it uses less digits than its factorization.

509949887902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215532532 (or 215532519 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 70.

The spelling of 509949887902 in words is "five hundred nine billion, nine hundred forty-nine million, eight hundred eighty-seven thousand, nine hundred two".